Submission #1120350

#	Time	Username	Problem	Language	Result	Execution time	Memory
1120350		Moonn	Palindrome-Free Numbers (BOI13_numbers)	C++17	52.50 / 100	1097 ms	512 KiB

numbers

#pragma GCC optimize("O3")
#include<bits/stdc++.h>
#define ll long long
#define endl "\n"
#define AI ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
int main()
{
    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    ll a,b,s=0,z=0,i,j;
    cin>>a>>b;
    ll tt[19];
    tt[0]=1;
    for(i=1;i<19;i++)
    tt[i]=tt[i-1]*10;
    if(a<tt[1])
    a=tt[1];
    //cout<<a<<' '<<b<<endl;
    while(a<=b)
    {
      //  cout<<a<<' ';
        string x=to_string(a);
        ll z=0,eded=x[0]-'0';
        bool bo=true;
        for(i=1;i<x.size();i++)
        {
            if(x[i]==x[i-1])
            {
                bo=false;
                z=x.size()-i-1;
                j=i;
                while(x[j]=='9')
                {
                    j--;
                    z++;
                    eded/=10;
                    if(j==-1)
                    break;
                }
                if(j==-1)
                eded=tt[z];
                else
                eded=eded*(tt[z+1])+(x[j]-'0'+1)*tt[z];
                break;
            }
            if(i>1 and x[i]==x[i-2])
            {
                bo=false;
                z=x.size()-i-1;
                j=i;
                while(x[j]=='9')
                {
                    j--;
                    z++;
                    eded/=10;
                    if(j==-1)
                    break;
                }
                if(j==-1)
                eded=tt[z];
                else
                eded=eded*(tt[z+1])+(x[j]-'0'+1)*tt[z];
                break;
            }
            eded*=10;
            eded+=x[i]-'0';
        }
       // cout<<eded<<"EDED ";
      //  if(bo)
      //  cout<<a<<' '<<s+1<<endl;
        if(bo)
        a=eded+1;
        else
        a=eded;
        if(bo)
        s++;
      //  cout<<s<<"say\n";
    }
    cout<<s<<endl;
}
/*
[
*/

Compilation message (stderr)

numbers.cpp: In function 'int main()':
numbers.cpp:26:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |         for(i=1;i<x.size();i++)
      |                 ~^~~~~~~~~
numbers.cpp:11:16: warning: unused variable 'z' [-Wunused-variable]
   11 |     ll a,b,s=0,z=0,i,j;
      |                ^

• Subtask 1: 12.5 / 25
• Subtask 2: 40 / 75